CVE-2023-34415 Open redirect in Firefox
Firefox failed to isolate processes for data URLs resulting from redirects, bypassing site isolation protections against Spectre-like attacks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2023-34415?
CVE-2023-34415 is a medium-severity vulnerability in Mozilla Firefox, published on 19 Jun 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
When choosing a site-isolated process for a document loaded from a data: URL that was the result of a redirect, Firefox would load that document in the same process as the site that issued the redirect. This bypassed the site-isolation protections against Spectre-like attacks on sites that host an "open redirect". Firefox no longer follows HTTP redirects to data: URLs. This vulnerability affects Firefox < 114.
Weakness: CWE-601
Which versions are affected by CVE-2023-34415?
It affects 1 product.
Products include Mozilla Firefox.
How do I fix CVE-2023-34415?
Upgrade to a fixed version.
Is CVE-2023-34415 being exploited?
There is no known exploitation of CVE-2023-34415 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-7wmp-qghr-8g7f, UBUNTU-CVE-2023-34415.